Passing plasma_mat_tag and sol_mat_tag with split chamber false results in an error

[Edgar-21]

I think we should probably just catch this and provide a useful error message?

[connoramoreno]

It should result in an error, since split_chamber determines whether plasma and SOL components are generated; the same goes for passing chamber_mat_tag when split_chamber is True. My thought was that the error message that results naturally would be enough, and that specially catching it would not be necessary, but perhaps the current error message isn't as self-explanatory as I think.

[Edgar-21]

It took me a while to figure it out, I'd imagine it would be even more cryptic without some level of familiarity with parastell

[gonuke]

Do we need to improve documentation for this? error messages? or just close it?

[connoramoreno]

I think we should at least incorporate a specialized error message for this, perhaps in the corresponding setter/getter.